Patents by Inventor Kamalesh Hatua

Kamalesh Hatua has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Induction motor
    Patent number: 8169181
    Abstract: An active reactive induction motor is provided. The motor comprises two sets of three-phase windings. One set of windings carries the active power and is called the power windings. The second set of windings carries the reactive power and is called the flux windings. The power windings carrying the active power provides more power to the induction motor than the flux windings carrying the reactive power. A driver circuit for driving the active reactive induction motor and the corresponding modes of operation is also provided.
    Type: Grant
    Filed: December 24, 2009
    Date of Patent: May 1, 2012
    Assignee: Indian Institute of Science
    Inventors: Vilanguppam Thathachary Ranganathan, Kamalesh Hatua
  • Common mode filter for motor controllers
    Patent number: 8115444
    Abstract: A motor drive circuit has a converter for coupling to an AC voltage source and an inverter coupled to the converter for providing a drive current for a motor. A common mode circulation loop is coupled to the converter and to the inverter, and circulates common mode current from both the converter and the inverter.
    Type: Grant
    Filed: May 31, 2006
    Date of Patent: February 14, 2012
    Assignee: Honeywell International, Inc.
    Inventors: Sukumar De, Kamalesh Hatua, Milan M R Rajne
  • INDUCTION MOTOR
    Publication number: 20110050157
    Abstract: An active reactive induction motor is provided. The motor comprises two sets of three-phase windings. One set of windings carries the active power and is called the power windings. The second set of windings carries the reactive power and is called the flux windings. The power windings carrying the active power provides more power to the induction motor than the flux windings carrying the reactive power. A driver circuit for driving the active reactive induction motor and the corresponding modes of operation is also provided.
    Type: Application
    Filed: December 24, 2009
    Publication date: March 3, 2011
    Applicant: INDIAN INSTITUTE OF SCIENCE
    Inventors: Vilanguppam Thathachary Ranganathan, Kamalesh Hatua
  • Short circuit protection by gate voltage sensing
    Patent number: 7463079
    Abstract: A protection circuit monitors the gate voltage of an insulated gate bipolar transistor (IGBT) or metal oxide semiconductor field effect transistor (MOSFET) to protect the transistor during a time when it is being turned on. In one embodiment, the circuit monitors a transient gate voltage of the transistor when it is turned on. A short or overcurrent condition is detected when the gate voltage exceeds a delayed reference signal.
    Type: Grant
    Filed: May 5, 2006
    Date of Patent: December 9, 2008
    Assignee: Honeywell International Inc.
    Inventors: Sukumar De, Kamalesh Hatua, Milan M R Rajne
  • Common mode filter for motor controllers
    Publication number: 20070278988
    Abstract: A motor drive circuit has a converter for coupling to an AC voltage source and an inverter coupled to the converter for providing a drive current for a motor. A common mode circulation loop is coupled to the converter and to the inverter, and circulates common mode current from both the converter and the inverter.
    Type: Application
    Filed: May 31, 2006
    Publication date: December 6, 2007
    Inventors: Sukumar De, Kamalesh Hatua, Milan Rajne
  • Short circuit protection by gate voltage sensing
    Publication number: 20070257725
    Abstract: A protection circuit monitors the gate voltage of an insulated gate bipolar transistor (IGBT) or metal oxide semiconductor field effect transistor (MOSFET) to protect the transistor during a time when it is being turned on. In one embodiment, the circuit monitors a transient gate voltage of the transistor when it is turned on. A short or overcurrent condition is detected when the gate voltage exceeds a delayed reference signal.
    Type: Application
    Filed: May 5, 2006
    Publication date: November 8, 2007
    Inventors: Sukumar De, Kamalesh Hatua, Milan Rajne